Boot and shoe sewing machine



(ModeL) 2 Sheets-Sheet 1.

E. WOODWARD. Boot and Shoe Sewing Machine. N0. 234,513. Patented Nov. 16, I880.

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2 Sheets-Sheet 2. 7

(Model.)

B WOODWARDv Boot and Shoe Sewing Machine. No 234,513. Patented Nov. 16,1880.

' UNTTED STATES PATENT Trice.

ERASTUS VVOODWARD, OF BOSTON, ASSIGNOR TO GEORGE W. COPELAND, TRUSTEE, OF MALDEN, MASSACHUSETTS.

BOOT AND SHOE SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 234,513, dated November 16, 1880.

Application filed June 29, 1880.

To all whom it may concern:

Be it known that I, ERAsTUs WOODWARD, of Boston, in the county of Suffolk and Commonwealth of Massachusetts, have invented an Improvement in Boot and Shoe Sewing- Machines, of which the following is a specification.

This invention is an improvement upon that described in reissue Letters Patent N 0. 6,535,

IO dated July 6, 1875, granted Gordon McKay and Robert H. Mathies, assignors to Gordon McKay, trustee.

It consists in the combination of the horn with a whirl having alternate periods of rotation and rest as it is moved in one direction; also in mechanism for providing the whirl with said movement.

The operation and construction of the horn and whirl are fully described in said Letters Patent, and also in Letters Patent No. 45,422, granted McKay and Blake, December 13, 1864, and in various patents of subsequent date.

The mechanism in the horn for operating the whirl is the same mechanism that is de- 2 5 scribed in the said reissue Letters Patent No.

Reference is made to the accompanying drawings, forming a part of this specification, in explaining the nature of my invention, in

which- Figure 1 is a view, part in elevation and part in section, of my invention. Fig. 2 is a plan below the line x no of Fig. 1. Fig. 3 is a side elevation of my improvement. Fig. 4 is 5 a cross-section 011 the line y y of Fig. 1, showing one position of the operative mechanism hereinafter described. Fig. 5 is a crosssection on the same line, showing another position thereof.

The whirls have been provided with alternate periods of rotation and rest for the purpose of feeding the thread to the hook-needles, as described in said reissue Letters Patentthat is, the whirl has been made to turn around the needle about two-thirds of a revolution at a time, when the needle has arrived at the lowest part of its stroke, carrying and laying the thread into the hook of the needle, and then, when the needle is withdrawn from the whirl, to return or turn back to its first posi- (Model) tion, ready to again perform the operation of laying the thread into the book of the needle.

Instead of providing the whirl with alternate periods of rotation and rest, in which the movement of the whirl is reversed between the 5 5 rests, I provide the whirl with a movement of rotation in one direction, and provide one period of rest for each complete revolution.

A represents the horn; B, the work-plate bed or support, 0, the whirl; c, a bevel-gear upon the whirl; c, a bevel-gear upon the shaft D; d, the bevel-gear at the lower end of said shaft; 0, the bevel gear upon the horizontal shaft E, which engages with the bevel-gear d e, a bevel-gear upon the said shaft E, which 6 engages with the bevel-gear f, upon the vertical shaft F. Thus far, the construction is similar to that described in the said reissue Letters Patent.

The shaft F has a bearing in the foot of the horn, and is operated by means of the camgroove G in the block g, and cam-pin H upon the cam-disk h. The shaft F projects upward from the central block, g, and furnishes the upper bearing thereof. Suitable hearing at the lower end of the block in the frame a is also provided.

The cam-disk h is revolved continuously by means of the shaft h, connected by the bevelgear 7L2 7L3 and shaft h, or in any other desirable manner, with the main shaft of the machine.

The block 9 is further provided with the lugs 9 which are separated by a space, 9 a trifle greater than the width of the cam-disk h. 8

The lugs are so arranged upon the block as to bring the space between them in line with the upper portion of the cam-groove G. The cam-disk his cut away at W, leaving the boss h supporting the cam-pins H, and the shoulders h? are preferably somewhat beveled on their edge.

Upon the revolution of the cam-disk the campin H enters the cam-groove G at its lowest point and revolves the block g, leaving the cam-groove at the upper end of the block. 5 At the instant immediately preceding its disengagement from the groove the cam-disk commences to enter the recess between the lug at the point h ,and the edge of the camdisk between the shoulders k acts in connee- 10o tion with the lugs g in maintaining the block at rest until the cam-pin is about entering the lower portion of the cam-groove G, when the shoulder h passes beyond the lugs and allows the block to be revolved.

The ratio of the rest to the movement of the block 9, as shown by the drawings, is about three to one, providing the cam-disk h has a uniform rate of speed at all times.

By providing the blocks 9 with two cam grooves and the disk h with two cam-pins, and in otherwise modifying the shape of the camdisk, the block g may be rotated twice in one revolution of the cam-disk h, and other modifications of its movement are obvious.

It will be observed that the space between the shoulders h and the boss h provides sufficient room for the rotation of the lugs g between them immediately after the commencement and before the end of the rotation of the block 9; also, that the portion lbs of the cam-disk, in connection with the lugs 1 act as stops in holding the block 9 stationary until the cam-pin has reached a position to engage with the cam-groove; also, that the construction and arrangement of the cam-disks, cam-pins, lugs, and cam-groove are such that the cam-pin must have entered, or must be about to enter, the camgroove before the portion h of the cam-disk has revolved beyond the lugs 9 also, that the cam-pin must be about leaving the cam-groove when the portion h of the cam enters between the lugs.

It is desirable that the block be brought to rest by the cam-pin, in which case, of course, the portion of the cam-groove at the lower and upper ends must be substantially vertical. This construction is desirable in order that the lugs 9 may not backlash on the portion h of the cam-disk after the cam-pin H leaves the groove.

The advai'itages of this invention consist mainly in the economy and simplicity of construction.

In operation, the whirl G is rex'olved once for every revolution of the block g, and then rests until it is again revolved by the cam-pin H and block G, the whirl making one complete revolution, then resting about twice the time in which the revolution was made, and then again making a revolution.

Having thus fully described the invention, what I claim, and desire to secure by Letters Patent, is

l. The combination, with the supportinghorn and whirl O mounted therein, of the block g, provided with the cam-groove G, and the lugs 9 the cam'disk h, provided with the campin H and projecting portion h and mechanism t'or operating said disk and communicating the proper motion from said block 9 to the whirl, substantially as described.

2. The combination, with the supportinghorn and whirl G mounted therein, of the block g, provided with the cam-groove G, the cam-disk h, provided with the cam-pin H and projecting portion [L8, and mechanism for rotating the disk h, and for communicating the proper rotary motion from the block g to the whirl, and for holding the block stationary during a portion of the rotation of said disk, whereby the whirl is caused to have alternate periods of rotation and rest, substantially as described.

3. The combination, with the supportinghorn and whirl mounted therein, of the block g, provided with the canrgroove G, the disk It, provided with the cam-pin H, and mechanism for rotating said disk, for communicating motion from the block g to the whirl and for looking the said block in a stationary position while the cam-pin H is not engaging the camgroove G, substantially as described.

4. The combination, with the supportinghorn and whirl mounted therein, of the block g, provided with the spiral groox c Gr, extending completely around the block and otherwise shaped, as described, mechanism for communicating motion from the block to the whirl, and a revolving disk provided with the campin H, adapted to engage the cam-groove during a portion of its revolution in revolving the block g, and mechanism for revolving the camdisk, all substantially as set forth.

ERASTUS WVOODXVARD.

Witnesses:

F. F. RAYMOND, 2d, A. J. OETTINGER. 

